Another Active and Wireless speaker to consider would be the Dynaudio Xeo3. All you would need would be a source and 1 set of Ic's to plug into the transmitter from the source and power for the speakers and source. It even has an USB input if you want to stream from a computer.
http://www.dynaudio.com/int/xeo/Xeo_is_Multi_source.php
http://www.dynaudio.com/int/xeo/Xeo_is_Multi_source.php